DIN EN ISO 17161-2016 Fine ceramics (advanced ceramics advanced technical ceramics) - Ceramic composites - Determination of the degree of misalignment in uniaxial mechanical tests .pdf

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1、October 2016 English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 81.060.30!%nJ“2577539www.din.deD

2、IN EN ISO 17161Fine ceramics (advanced ceramics, advanced technical ceramics) Ceramic composites Determination of the degree of misalignment in uniaxial mechanical tests (ISO 17161:2014);English version EN ISO 17161:2016,English translation of DIN EN ISO 17161:2016-10Hochleistungskeramik Keramische

3、Verbundwerkstoffe Bestimmung der Fluchtungsfehler bei mechanischen Prfungen mit einachsiger Beanspruchung (ISO 17161:2014);Englische Fassung EN ISO 17161:2016,Englische bersetzung von DIN EN ISO 17161:2016-10Cramiques techniques Cramiques composites Dtermination du degr de nonalignement lors des ess

4、ais mcaniques uniaxiaux (ISO 17161:2014);Version anglaise EN ISO 17161:2016,Traduction anglaise de DIN EN ISO 17161:2016-10SupersedesDIN CEN/TS 15867:200907www.beuth.deDocument comprises 16 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered aut

5、horitative.10.16 DIN EN ISO 17161:2016-10 2 A comma is used as the decimal marker. National foreword The text of ISO 17161:2014 has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” and has been taken over as EN ISO 17161:2016 by Technical Committee CEN/TC 184 “Advanced technical ceram

6、ics” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was DIN-Normenausschuss Materialprfung (DIN Standards Committee Materials Testing), Working Committee NA 062-02-94 AA Prfung von Hochleistungskeramik Keramische Verbundwerkstoffe. The DIN Standards and national

7、 documents corresponding to the European publications and International Standards referred to in this document are as follows: DIN 3611 DIN EN ISO 3611 ISO 7500-1 DIN EN ISO 7500-1 ISO/IEC 17025 DIN EN ISO/IEC 17025 CEN/TR 13233:2007 DIN-Fachbericht CEN/TR 13233:2007-09 Amendments This standard diff

8、ers from DIN CEN/TS 15867:2009-07 as follows: a) Subclause 5.2 “Load train” has been added; b) in Subclause 5.3, the permissible dimensions of the active surface of strain gauges have been changed; c) a NOTE to Figure 4 has been added; d) the percent bending strain (PBS) is now explained in Subclaus

9、e 8.5; e) ISO 17161:2014 has been adopted. Previous editions DIN CEN/TS 15867: 2009-07 National Annex NA (informative) Bibliography DIN EN ISO 3611, Geometrical Product Specifications (GPS) Dimensional measuring equipment: Micrometers for external measurements Design and metrological characteristics

10、 DIN EN ISO 7500-1, Metallic materials Calibration and verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system DIN EN ISO/IEC 17025, General requirements for the competence of testing and calibration lab

11、oratories DIN-Fachbericht CEN/TR 13233:2007-09, Advanced technical ceramics Notations and symbols EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 17161 April 2016 ICS 81.060.30 Supersedes CEN/TS 15867:2009English Version Fine ceramics (advanced ceramics, advanced technical ceramics) - Ceram

12、ic composites - Determination of the degree of misalignment in uniaxial mechanical tests (ISO 17161:2014) Cramiques techniques - Cramiques composites - Dtermination du degr de non-alignement lors des essais mcaniques uniaxiaux (ISO 17161:2014) Hochleistungskeramik - Keramische Verbundwerkstoffe - Be

13、stimmung der Fluchtungsfehler bei mechanischen Prfungen mit einachsiger Beanspruchung (ISO 17161:2014) This European Standard was approved by CEN on 25 March 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standa

14、rd the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English,

15、 French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulg

16、aria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Tu

17、rkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.

18、Ref. No. EN ISO 17161:2016 EContents PageEuropean foreword .31 Scope . 52 Normative references 53 Terms and definitions . 53.1 General . 53.2 Type of defects 64 Principle 65 Apparatus . 75.1 Test machine . 75.2 Load train. 85.3 Strain gauges . 85.4 Data recording system 85.5 Micrometers 86 Reference

19、 test specimens 87 Reference test specimen preparation . 107.1 Adhesion of strain gauges . 107.2 Reference test specimen validity 108 Test procedure . 108.1 General 108.2 Correction of the torsion defect 108.3 Correction of the C defect . 118.4 Correction of the S defect 128.5 Final verification bef

20、ore starting a series of measurements on CMCs . 139 Test report 13Bibliography .14DIN EN ISO 17161:2016-10 EN ISO 17161:2016 (E)2Foreword 4European foreword The text of ISO 17161:2014 has been prepared by Technical Committee ISO/TC 206 “Fine ceramics” of the International Organization for Standardiz

21、ation (ISO) and has been taken over as EN ISO 17161:2016 by Technical Committee CEN/TC 184 “Advanced technical ceramics” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at

22、the latest by October 2016, and conflicting national standards shall be withdrawn at the latest by October 2016 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any o

23、r all such patent rights. This document supersedes CEN/TS 15867:2009. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark

24、, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notic

25、e The text of ISO 17161:2014 has been approved by CEN as EN ISO 17161:2016 without any modification. DIN EN ISO 17161:2016-10 EN ISO 17161:2016 (E)3 ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work o

26、f preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmenta

27、l, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the IS

28、O/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). Attention is drawn to the possibil

29、ity that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of pa

30、tent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as inf

31、ormation about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 206, Fine ceramics.DIN EN ISO 17161:2016-10 EN ISO 17161:2016 (E)4 1 ScopeThis International S

32、tandard describes a procedure to verify the degree of misalignment of the load train of the test machines using a reference test specimen uniformly loaded in tension or in compression, and to give indications in order to correct defects such as torsion and bending.This International Standard is not

33、intended to provide a quantitative and acceptable limit before the testing of ceramic matrix composites with a fibre reinforcement: unidirectional (1D), bidirectional (2D), and tridirectional (xD, with 2 x 3) loaded along one principal axis of reinforcement. This limit depends on the sensitivity of

34、each type of composite to the misalignment defect.NOTE 1 This limit is to be defined between the testing establishment and the customer.NOTE 2 Monolithic ceramics are very sensitive to misalignment defects while CMCs (ceramic matrix composite) in general are moderately sensitive to them.2 Normative

35、referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applie

36、s.ISO 3611, Geometrical product specifications (GPS) Dimensional measuring equipment: Micrometers for external measurements Design and metrological characteristicsISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification

37、 and calibration of the force-measuring systemISO/IEC 17025, General requirements for the competence of testing and calibration laboratoriesCEN/TR 13233:2007, Advanced technical ceramics Notations and symbols (to be replaced by future ISO NP 19634)3 Terms and definitionsFor the purposes of this docu

38、ment, the terms and definitions given in CEN/TR 13233:2007 (to be replaced by future ISO NP 19634) and the following apply.3.1 General3.1.1calibrated lengthlpart of the reference test specimen which has a uniform and minimum cross-section areaDIN EN ISO 17161:2016-10 EN ISO 17161:2016 (E)5 3.1.2widt

39、hbwidth of the reference test specimen in the calibrated length3.1.3thicknesshthickness of the reference test specimen in the calibrated length3.2 Type of defects3.2.1C-type magnitudeangle between the loading axis of each of the two gripsNote 1 to entry: See Figure 1.3.2.2S-type magnitudeddistance b

40、etween the loading axis when they are parallelNote 1 to entry: See Figure 2.3.2.3torsion defect magnitudeangle between the gripping planesNote 1 to entry: See Figure 3.4 PrincipleA rectangular cross section of a reference test specimen (Clause 7) equipped with 10 strain gauges is loaded in tension o

41、r in compression, up to a load corresponding to 10 % of the nominal load capacity of the load cell used for the tests of CMCs. The stress corresponding to this value shall not exceed 50 % of the elasticity limit of the material used for the reference test specimen. The readings obtained from the str

42、ain gauges bonded on the calibrated length of the reference test specimen allow the determination of the degree of misalignment.The positioning of strain gauges is such that it indicates the magnitude of defects. These magnitudes allow the correction, in a practical manner, of the different types of

43、 defects: bending defects, either C (Figure 1) or S (Figure 2); torsion (Figure 3).The indications for correction are obtained by comparing the experimental readings of the strain gauges to values from charts established from numerical simulations.DIN EN ISO 17161:2016-10 EN ISO 17161:2016 (E)6 Figu

44、re 1 C defect magnitudedFigure 2 S defect magnitude12Key1 lower grip2 upper gripFigure 3 Torsion defect magnitude5 Apparatus5.1 Test machineThe configuration of the test machine, including the load train and load cell, shall be identical to the test machine used for the tests on the CMCs and shall b

45、e in accordance with ISO 7500-1.DIN EN ISO 17161:2016-10 EN ISO 17161:2016 (E)7 5.2 Load trainThe load train configuration shall ensure that the load indicated by the load cell and the load experienced by the test specimen are the same.The grip design shall prevent the test specimen from slipping. T

46、he choice of gripping system will depend on material, on test specimen design, and on alignment requirements.5.3 Strain gaugesThe principle of this method requires the use of strain gauges with an active surface equal to or smaller than 4 2,5 mm2.Furthermore, the distance between the edge of the tes

47、t reference specimen and the longitudinal axis of the strain gauge shall be such as to avoid edge effects. A minimum distance of 2 mm is required.Care shall be taken to ensure that the strain gauge readings are not influenced by the surface preparation and the adhesive used.5.4 Data recording system

48、A calibrated recorder can be used to record load/strain curves. The use of a data recording system combined with an analogue recorder is recommended.All strain measuring equipment and data acquisition systems shall be calibrated as appropriate. Typically they shall have an accuracy to within 0,5 % of indicated reading or 3 microstrain, whichever